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Carbon nanotube/polyurethane/polyacrylonitrile composite conductive fiber and preparation method thereof

A technology of carbon nanotubes and polyacrylonitrile, applied in the manufacture of conductive/antistatic filaments, fiber chemical characteristics, conjugated synthetic polymer artificial filaments, etc., to achieve increased strength and modulus, high electrical conductivity, and good electrical conductivity performance effect

Inactive Publication Date: 2013-04-10
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on polyacrylonitrile fibers co-modified by polyurethane and carbon nanotubes in the literature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of carbon nanotube / polyurethane / polyacrylonitrile composite conductive fiber, the steps are as follows:

[0023] (1) Put the multi-walled carbon nanotubes into a single-necked flask, add 70% concentrated nitric acid under vigorous stirring, reflux in a constant temperature oil bath at 140°C for 1 hour, take it out, dilute with deionized water, filter, and use deionized Rinse repeatedly with water, and finally put the obtained black solid in a vacuum oven at 50°C to dry to constant weight to obtain carboxylated multi-walled carbon nanotubes;

[0024] (2) Put 10 grams of carboxylated carbon nanotubes, 50 grams of polyurethane and 140 grams of polyacrylonitrile into 800 grams of dimethyl sulfoxide and stir thoroughly to dissolve the polyurethane and polyacrylonitrile to obtain a blended solution. Afterwards, it is filtered under reduced pressure and vacuum defoamed to obtain a blended spinning stock solution;

[0025] (3) Adopt the wet spinning techno...

Embodiment 2

[0027] A preparation method of carbon nanotube / polyurethane / polyacrylonitrile composite conductive fiber, the steps are as follows:

[0028] (1) Put single-arm-walled carbon nanotubes into a single-necked flask, add 98% concentrated sulfuric acid under vigorous stirring, reflux in a constant temperature oil bath at 120°C for 1.5 hours, take it out, dilute with deionized water, filter, and use Rinse repeatedly with ionized water and dry in a vacuum oven to constant weight to obtain carboxylated single-armed carbon nanotubes;

[0029] (2) 5 grams of carboxylated carbon nanotubes, 60 grams and 135 grams of polyacrylonitrile were placed in 600 grams of dimethyl sulfoxide and stirred thoroughly to dissolve polyurethane and polyacrylonitrile to obtain a blended solution. After vacuum filtration and vacuum defoaming, the blended spinning stock solution is obtained;

[0030] (3) After the above spinning slurry is filtered and pumped, it is extruded into the coagulation bath through t...

Embodiment 3

[0032] A preparation method of carbon nanotube / polyurethane / polyacrylonitrile composite conductive fiber, the steps are as follows:

[0033] (1) Put the multi-walled carbon nanotubes into a single-necked flask, add a mixture of 98% concentrated sulfuric acid and 70% concentrated nitric acid (volume ratio 3:1) under vigorous stirring, and put it in a constant temperature oil bath at 110°C to reflux for 0.5 Take it out after 1 hour, dilute with deionized water, filter, and dry to constant weight to obtain purified carbon nanotubes;

[0034] (2) Put 16 grams of carboxylated carbon nanotubes, 64 grams of polyurethane and 120 grams of polyacrylonitrile into 900 grams of dimethylformamide and stir thoroughly to dissolve the polyurethane and polyacrylonitrile to obtain a blended solution. After vacuum filtration and vacuum defoaming, the blended spinning stock solution is obtained;

[0035] (3) After the above spinning slurry is filtered and metered, it is extruded into the coagulat...

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Abstract

The invention discloses a carbon nanotube / polyurethane / polyacrylonitrile composite conductive fiber. The composite conductive fiber consists of 1 to 10 mass percent of carbon nanotube, 9 to 40 mass percent of polyurethane and 50 to 90 mass percent of polyacrylonitrile. The carbon nanotube / polyurethane / polyacrylonitrile composite conductive fiber is prepared by a wet spinning method and by modifying the polyacrylonitrile by using the carbon nanotube and polyurethane. Polyurethane is formed into microfiber in situ in the spinning process by a shape control method in the polymer mixture spinning process, and the carboxyl on the surface of the carbon nanotube which is acidized and polyurethane form a hydrogen bond, so the carbon nanotubes are selectively distributed in the in-situ microfiber. The carbon nanotube / polyurethane microfiber forms a continuous network chain-shaped microfiber conductive channel in the polyacrylonitrile substrate so as to obtain the composite conductive fiber.

Description

technical field [0001] The technology of the invention belongs to the field of conductive nanocomposite materials, in particular to a preparation method of carbon nanotube / polyurethane / polyacrylonitrile composite conductive fiber. Background technique [0002] Synthetic fibers have achieved an important position in the fiber market due to their excellent performance, but these fibers are prone to static electricity and are easily stained; and the higher their specific resistance, the stronger the static electricity, and the interference in clothing is less Obviously, for example, it will cause chemical fiber clothing to intertwine and absorb dust, which will affect wearing; if static electricity accumulates to a certain extent, it will be discharged whenever there is an opportunity. Static discharge will cause explosions and fires in certain occasions, and it will also cause electric shock disasters. Therefore, this point has become a major defect in the fierce competition ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/16D01F8/08D01F1/09D01D5/06D01D5/14
CPCD01F6/54D01D5/06D01F1/09D01F6/94
Inventor 张慧勤潘玮陈燕孙亚丽刘红燕
Owner ZHONGYUAN ENGINEERING COLLEGE
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